method
Motion.to
Motion.to(entity, from, to, dur, ease)
Starts a value tween on an entity's Motion component: it sets from, to, dur and ease, resets the timer, and seeds value at from, so the engine interpolates value from from to to over dur ticks and latches done at the end. One call replaces setting five fields by hand — a health bar sliding, a door opening, an alpha fade. A no-op if the entity has no Motion. Integer and deterministic.
Parameters
entitythe entity carrying Motiondurthe duration in engine ticksease0 linear, 1 in, 2 out, 3 in-outExample
program Demo {
property Motion { ticks: int = 0, dur: int = 0, from: int = 0, to: int = 0, ease: int = 0, value: int = 0, done: int = 0 }
model Door { Motion }
entry {
spawn Door { Motion { } }
let e = World.query_next(World.prop_id("Motion"), 0)
Motion.to(e, 0, 64, 30, 2) # slide 0 -> 64 over 30 ticks, ease-out
quit()
}
}